Two former Parramatta Eels players are accused of harbouring semi-automatic weapons and possessing more than half-a-million dollars in cash after dramatic arrests in Sydney's Centennial Park yesterday.

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Harsher critics accused him of embarrassing Australia's international standing and jeopardising bilateral ties by publishing his candid thoughts about foreign leaders and private conversations.

Mr Varghese said he wasn't aware of any complaints being made by foreign embassies to Australia after Mr Carr's revelations, despite media reports suggesting otherwise.

But he did express disappointment at some of the material published, saying there was an expectation that conversations held in private by Australia's foreign minister would not be revealed.

"To the extent that the book goes contrary to that, I think it is unfortunate," Mr Varghese said.

Another senior DFAT official said he wasn't aware of Mr Carr specifically requesting "steel-cut oats" be made available during his trips, but it was known the senator had certain dietary "preferences".

"I do recall that they didn't refer to steel-rolled oats," said assistant secretary Jeff Roach.

Labor senator Penny Wong criticised her Liberal colleagues of wasting more than an hour of the committee's time with their "book club".